To study SiC and other material joining, the wettability of Cu-Al-Si-Ti brazing alloys on silicon carbide was investigated by sessile drop method. It was found that the Ti content and the wetting temperature affected greatly the contact angle. The interface of brazing alloys/silicon carbide was observed and analysed by SEM and XRD. The result indicated that the interface consisted of two layers, e.g. one of them was a thin interface layer with TiC, the other was a thick interface transition layer with Cu-more content and Ti-less content. The diffusion of element Cu determines the property of transition layer. This kind of brazing alloy is a good candidate for the high temperature brazing silicon carbide.